<!DOCTYPE html>
<html>
<head>
<script>

function repeatChar(s, n)
{
  while (s.length < n)
    s += s;
  return s.substr(0, n);
}

function boom()
{
  document.documentElement.contentEditable = "true";
  document.execCommand("inserthtml", false, "<button><\/button>");
  document.execCommand("inserthtml", false, repeatChar("i", 34646));
  document.execCommand("contentReadOnly", false, null);
  document.execCommand("removeformat", false, null);
  document.execCommand("hilitecolor", false, "red");
  document.execCommand("inserthtml", false, "a");
  document.execCommand("delete", false, null);
}

</script>
</head>

<body onload="boom();"></body>

</html>
